I'm not a real Dr. Who lover, but this is cool. XD David Tennant (10th Doctor) married Georgia Moffett (the 10th Doctor’s daughter in the episode “The Doctor’s Daughter”), who is the daughter of Peter Davison (5th Doctor) and they had a daughter. So the Doctor’s daughter played the Doctor’s daughter in “The Doctor’s Daughter” and then married the Doctor and had the Doctor’s daughter.